excess vitamin b12 side effects

Do vitamin b12 supplements have any side effects?

Answered by:
Dr. Alan H. Ali
2 Doctor agrees
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 Abdomen Acne Antibiotic Vitamin B 12 Facial pimples Fever Headache Hypersensitivity Joints Pimples Stomach discomfort Sumycin Tetracycline Toxicity Upset stomach Vertigo Vitamin B12 Vitamin deficiency Supplements Vitamins and supplements

B12 Vitamin

Generally, there is no risk of toxicity from too much B12, however, if taken at same time with Antibiotics for Acne, such as Tetracycline, it can lower effectiveness of the Antibiotic. Some reported adverse events include Allergy, Fever, Headaches, Joint pains, Upset stomach, Swelling, Dizziness.
Related to excess vitamin b12 side effects: Abdomen Acne Antibiotic Vitamin b 12 Facial pimples Fever Headache

I'm taking a vitamin b12 supplement of 1,000 mcg's per day, any side effects to worry about?

Answered by:
Dr. Andrew Blazar
Obstetrics and Gynecology
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But it may not be helpful and may be wasteful
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Vitamins and supplements

Do's And Don'ts

Vitamin B12 is given to "lose weight" at fraudulent clinics. It does not help lose weight!

TipTap created by:
Dr. Thomas C. Namey
3 Doctor agrees
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Should i consume tinospora cardifolia concentrate, as in 2010 i was diagnosed with itp and vitamin b12 deficiency? Does the herb has side effects?

Answered by:
Dr. Jack Mutnick
Allergy and Immunology
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You really should discuss this with your hematologist who treated your ITP and/or whomever follows you for this condition. I cannot personally recommend you to take an "herbal concentrate" since it is not monitored by the FDA and side effects have been reported.

My doc says im aneamic and has prescribed me dexorange syrup it has iron folic acid and vitamin b12 but im afraid will it giv me any side effects?

Answered by:
Dr. Jack Rubin
Nephrology and Dialysis
 Anemia Blood Blood loss Constipation Folate Folic acid Folvite Gastroenterology Iron Iron blood level Low blood count Menstrual Vitamin B 12 Vitamin B12

Anemia treatmemt

Other than possible constipation, caused by iron, the syrup (S) your physician (P) prescribed will give harmless. Ask your P what you folate, iron and B12 values are. If they are normal, you will gain nothing by the S. Anemia can come from blood loss, either by GI or menstrual losses. If you iron (I) level is low, and you eat meat, consider one of those as the cause of your anemia.
Related to excess vitamin b12 side effects: Anemia Blood Blood loss Constipation Folate Folic acid Folvite

Vegetarian Diet

Do's And Don'ts

Vegetarians (especially women) need to get Vitamin B12 level checked

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2 Doctor agrees
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Related to excess vitamin b12 side effects: Diet Female Vegetarian diet Vitamin b12 Women Folate Eating a vegetarian diet

When is the best time to take vitamins, such as vitamin B12 and Biotin?

Answered by:
Dr. Joy M. Jackson
Family Medicine


As a general rule of thumb, it is better to take vitamins with a meal. This allows for better absorption. However this is not an absolute. In addition, remember to check with your doctor before taking any vitamins, minerals, or supplements in order to ensure that it won't interfere with any possible medications you are taking.
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Are all B vitamins essential for our body/health?? Namely Vitamin B12 and B6?? Thank you.

Answered by:
Dr. Olivia C. Liao
2 Doctor agrees
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Neuropathy Body Nerve Nerve damage Neuropathy Neuropraxia Vitamin B 12 Vitamin B12 Vitamin B6

B12 and B6

are essential for good health. deficiencies can cause nerve damage.
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Is taking prenatal vitamins with vitamin b12 when not pregnant generally considered safe?

Answered by:
Dr. Wayne W. Ingram
Obstetrics and Gynecology
2 Doctor agrees
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Go for it!
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Is it true that huge doses of vitamin B12 inhibit the levels of other B vitamins? (source:the web)

Answered by:
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Someone writing on the internet can put out any silly fantasy and make money doing it, as they appear very learned and caring. This one's just not true. Unlike these people, the scientific physicians in our community and on HealthTap are bound by law to tell the truth.
Related to excess vitamin b12 side effects: Vitamin b12 Vitamin deficiency

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